Friction driving-gear.



No.859.066. PATBNTED JUL-Y2, 1907.-

J. HUMMEL. FRICTION DRIVING GEAR.

APPLICATION FILED MAY 31,1906.

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No. 859.066. PATENTED JULY 2, 1907.

J. HUMMEL. FRICTION DRIVING GEAR.

APPLIOATION FILED MAY 31,1906.

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JOSEF HUMMEL, OF PARIS, FRANCE.

FRICTION DRIVING-GEAR.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed May 31,1906. Serial No. 319,612.

To all whom it may concern:

Be it known that I, Josnr HUMMEL, a subject of the King of Austria,residing at Paris, France, have in vented certain new and usefulImprovements in Friction Driving-Gears; and I do declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

My invention relates to improvements in friction driving gears for useon machines for mixing or beating eggs, cream, light pastes and the likeand on other machinery.

The object of the invention is to provide a simple, durable andeffective frictional gearing of this character by means of which thespeed of the driven shaft, and hence the beater or agitator which itcarries, may be varied as desired while the machine is in motion.

With the above and other objects in view, the invention consists ofcertain novel features of construction, combination and arrangement ofparts hereinafter described and claimed.

In the accompanying drawings :Figure l is a vertical sectional viewthrough my improved variable speed friction gearing; Fig. 2 is a sideelevation, with parts in section, of a slightly modified form of thesame, and Fig. 3 is a top plan view of the parts shown in Fig. 2.

Referring to the drawings by numeral, 1 denotes the main drive shaftmounted in suitable bearings upon a frame or support 2 and having uponone of its ends a band-wheel or similar driving element 3. Fixed uponsaid shaft, by a screw or other fastening means 4, is a large frictiondriving wheel or disk 5, which is adapted to impart its motion to asmall driven friction wheel or roller 6 mounted upon a driven shaft 7disposed at right angles to the shaft 1. The shaft 7 is preferablydisposed vertically and has secured upon it, adjacent to its lower end,a collar 8, between which and a stationary bearing 9 upon the support 2,is provided an annular row of bearing balls or antifriction devices 10.Said lower end of the shaft has mounted upon it a crank 11, or any othersuitable device for operating the beater or agitator of a machine formixing or beating eggs, cream and the like, or for any other purpose.The upper end of the shaft 7 carries a steel seat 12, which receives asteel pivot 13 upon a bearing block 14. The latter is stationary, beingsupported by a bracket arm from the frame or support 2. The shaft 1 isadapted to have a slight longitudinal sliding movement in its bearingsand in the bearing-block 14, and surrounding it between two collars 16,is a coilspring 15, which serves to force the driving disk 5 away fromthe driven friction wheel or roller 6. Any suitable means (not shown)may be provided for moving the shaft 1 and the driving disk 5longitudinally against the tension of the spring 16, so as to cause thelatter to frictionally engage the periphery of the driven wheel 6.

Instead of employing the parts 12, 13, shown in Fi 1, I may substitutetherefor a split, tapered or frustoconical shaped ring or band 17adapted to enter a socket 18 formed in the bearing-block 14 and havingin its bottom a steel bearing plate 19. The latter is engaged by asimilar pivot 20 provided on the upper end of the shaft 7 and surroundedby the bearing sleeve or band 17, which latter is split longitudinallyor verti cally, as shown at 21 in Fig. 3. This bearing sleeve or band 17is supported upon an apertured plate 22, through which the shaft 7extends, and it is adjustable by means of bolts 23 toward and from theprojecting lugs 24 upon the opposite sides of the bearing block 14, asclearly shown in Fig. 3. By tightening the nuts of the bolts 23, thesupporting plate 22 will be elevated to force the split band or sleeve17 into the socket 18 of the bearing block, and thus compensate for thewear of said parts. The driven friction wheel or roller 6 has a frictionsurface or periphery 6 clamped upon it by means of a removable plate 24,secured by screws as 24 and it is slidably mounted upon the upperportion of the shaft 7, so that it may be moved toward and from thecenter of the driving disk 5 for the purpose of varying its speed. Thesaid driven wheel 6 is permitted to slide upon the shaft 7, but iscaused to rotate therewith by a transverse pin or key 25 which itcarries and which projects through and slides in a longitudinal slot 26formed in said shaft 7. The driven wheel 6 is adjusted upon the shaft 7by turning a handwheel 27, which has its hub internally screw-threadedto provide a nut 28, which receives the square, external screw-threads29 upon a tubular screw or shaft which surrounds and slides upon theshaft 7. The hub or nut 28 is swiveled or mounted to rotate in astationary bearing 30 provided upon the support 2, and at the upper endof the hollow screw is a cup 31, which has a ball-bearing connection 32with the hub 6 of the driven wheel or roller 6. This ball bearingcomprises a casing 35, the ring 36 of which is fixed by screws 37 to thecup 31 at the top of the screw 29 and the remainder of the casing isfixed to the boss or hub of the roller 6. It will be seen that byrotating the hand wheel 27 the screw 29 will be raised and lowered andwill carry the driven wheel 6 with it, a guide piece 33 engaged with astraight guide groove 34 being provided for the purpose of guiding saidparts.

From the foregoing description taken in connection with the accompanyingdrawings, the construction, operation and advantages of the inventionwill be readily understood without requiring a more extendedexplanation. v

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of the invention, as defined by theappended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters-Patent is 1- 1. The combinationof a driving shafthaving a friction diskv fixed thereon, a driven shaft mounted to rotateat right angles to said driving shaft, a friction roller slidablyconnected With said driven shaft in position to engage said frictiondisk, said roller having an extended hub, a hollow screw slidable onsaid driven shaft and having at its upper end a cupshaped member and aball bearing connection between said cup-shaped member and the hub ofsaid roller and means for raising and lowering said screw.

2. The combination of a driving shaft having a friction disk fixedthereon, a driven shaft mounted to rotate at right angles to saiddriving shaft, a friction roller slidahl'y connected with said drivenshaft in position to engage said friction disk, said roller having anextended hub, a hollow screw slidable on said driven shaft and having atits upper end a cup-shaped member, a casing mounted on said hub andhaving bails arranged therein and an annular member fixed to saidcup-shaped member and adapted to close said casing and contact with saidbails.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOSEF HUMMEL.

Witnesses HANSON C. Coxn, ANTOINE Aueinn.

